Grinding machine



`4 Sheets-Sheet 1 INVENoR ATTORNEYS April 13, 1937. s. A. sTRlc'KLAND GRlNDIN-G MACHINE Filed Sept. 2.8, 1931 April 13, 1937. s. A. s'rRlcKLAND `'2,076,632

GRINDING MACHINE Filed sept.A ze, 1931 '4 sheets-sheet z ATTORNEYS April 13, 1937. s. A. sTRlcKLAND v 2,076,682

GRINDING MACHINE Filed Sept. v28, 1951 4 Sheets-Sheet 5 NI l s. I l E= mvENToR J AUORNEB April 13, 1937.

s. A. sTR'lcKLAND GRINDING MACHINE Filed Sept. 28, 1931 4 Sheets-Sheet 4 ATTORNE Y lll Patented pr. 13, 1937 UNITED STATES PATENT OFFICE 19 Claims.

My invention relates to grinding machines and has particular reference to a machine of this character for grinding the innerrace or cone of anti-friction bearings.

An object of the present invention is to provide a grinding machine wherein two angularly disposed surfaces of a bearing member may be ground simultaneously.

Further the invention provides a machine of this character which embodies a work-holder which is vmanually adjustableto bring the work to al position where the angularly disposed faces thereof will be in proper relation to the angularly disposed faces of a grinding element.

It is another object of the invention to provide a grinding machine wherein the work-holder may be utilized as a support for a diamond dressing tool thus permitting the machine to be utilized to dress the grinding element when the surfaces of the'latter have becomeworn.

The invention also contemplates a work-holder embodying a. plurality of cooperating fingers which positively hold the work in place and having means for disengaging the fingers from the Awork after the latter has been operated upon.

" after Aspecifically referred to, claimed and illustratedin the accompanying drawings, wherein- Figure I is a top plan View of my improved grinding machine and having parts broken away;

Fig. 2 is an enlargeddetail view showing the relation of the surfaces of the grinding 'element to the angular faces of the Work;

Fig. 3 is a View of the machine partly in vertical section and partly in elevation;

Fig. 4 is a vertical section;

Fig. 5 is a front end elevation of the motor driven grinding element embodied in the invention;

Fig. 6 is a view similar to Fig. 1', and showing the diamond dressing tool held by the work-holder to dress the grinding element;

Fig. 7 is a detail view of the diamond dressing element, and

Fig. 8 is a detail view showing the dressing element in position to be adjusted to engage the outer surface of the grinding element.

Referring to the invention in detail a vertical tubular standard or base 5 is provided and mounted thereon is a bed'plate 6, the latter being 'securedto an annular flange -1 on the base by clamping bolts 8. The upper face of the bed plate is formed with a dove-tailed tongue or track 9 which slidably receives a longitudinally extending dove-tail groove" I formed inthe under face "30 of a longitudinally shiftable carriage Il. In

order to -shift the carriage a manually rotatable that rotation -of the direction will shift the carriage-forwardly or rearwardly onthe bed plate.

shaft I2 is journaled in the outer end ofthe carnage and extends transversely of the under face thereof and is provided with a pinion I3. At-

tached to the oute'rend of the bed plate 6 and projecting laterally therefrom and extending beneath the pinion I3 isa rack bar I4 whose teeth are engaged by the pinion I3. It will be seen pinion I3 in the required Longitudinal movement of the carriage is limited by an ear I which is received on a threaded rod I6 projecting from the outer end of the bed plate and which is equipped with adjustable stops or nuts I1 upon opPOsite sides of the ear. l

Mounted on the upper face of the carriage is a disk or circular plate I8 which has its upper face formed with a dove-tail tongue 25 that extends at right angles to the dove-tail tongue 9.

Arranged on the disk I8 and adapted for longitudina-l movement in a direction at right angles to the carriage II is a. second carriage 23, the

latter having a. dove-tail groove 24 -inits underr face which receives the dove-tail tongue 25. The carriage 23 is adjusted by means of a rack bar 26 and a manually rotatable pinion 2.1 in the same manner as the carriage II.A

The carriage 23 is arranged to support a workholder or chuck and for that purpose a'substantially rectangular casting` or mounting 28 is arranged' upon the carriage 23. Lateral anges 29 -are formed on 'the lower edge of the casting or mounting which are engaged by anchoring clips 30 which in turn are anchored to the carriage by bolts 3|. n

' For the purpose of adjusting the work-holder to dispose the surfaces of the work in proper relation to the angularly disposed faces of a grinding wheel to be hereinafter referred to the casting 28 is mounted on the carriage 23 for adjust.

ment about' a vertical pivot 23a. The casting is normally held against turning'on the pivot 23a by means of a set screw 24d engaged with the 4 carriage 23 and passing through an arcuate slot 25a provided in the rear end of the casting.

In order to grind the surface of the work to any desired angle, the disk I8 is rotatably connected to the carriage II by a central vertically extending pivot I9. It will be seen that the entire structure above the carriage I8 may be swung to any desired position about the axis .I9 until the surfaces of the work are parallel to the 'grinding surfaces ofthe grinding wheel. Normally, the plate I8- is held fixed by means of a. bolt which is threaded into the carriage II and passes through an arcuate slot 22 at one edge of the disk.

The chuck'or work-holder comprises a sleeve `32 which extends longitudinally through the mounting and projects from the ends thereof.

'I'he forward end of collar 33 in which a the sleeve terminates in a head or chuck 34 is held.

Arranged for longitudinal movement within the vhead 84 is a plurality of cooperating angularlv their outer faces which support the anti-friction member A while the same is being ground.

In order to hold the fingers 85 in a position where the seats 31 will engage and hold the antifriction member, a longitudinally shiftable rod 35 is arranged within the sleeve 82 and is provided with a head $5 at its inner end which is engaged by a lug 4ll'formed on the inner end of each of the lingers. The opposite end of the rod projects from the sleeve and carries a grooved collar 4I. Encircling this outer end of the rod is a coiled spring having one end abutting the collar and its opposite end abutting the adjacent end of the sleeve and normally urges the rod in a direction to hold the head 88 against the lugs 45 of the lingers 85. It will therefore be seen that the head 29 limits the movement of the fingers so that they will only project far enough to engage their seats 81 with the antifriction member.

Means are provided for manually shifting the rod against the action ofthe spring 42 to advance the head 55 and permit the ,iingers I5 to project further from the head so that their seats 31 will .move away from the anti-friction member and permit the same to be moved. For this purpose a manually shiftable rod 48 is arranged parallel to the rod 88 and has one end received in a longitudinal guide 44 in one side of the mounting 28. The opposite end of this rod 45 carries a yoke 45 which is engaged with the grooved collar 4I. Mounted on one side of the mounting 28 for movement about a verl tical axis is a hand lever 41 carrying an upstanding lug 48 which is disposed in the path of movement of a laterally extending arm 48 fixed to the inner end of the rod 45 and which projects laterally through the mounting 28.

It will be seen that movement of the lever 41 towardsjthe mounting 28 will engage the lug 48 with the arm 49 and move the latter forwardly. This in turn shifts the rod forwardly in its guide and through the yoke 45 shifts the rod 88 forwardly and disengages the head 88 from the lugs 40.` With the head 85 thus advanced the springs 35 will function to project the iingers 85 t'o a point where their seats 81 will move ,away from the anti-friction member. However, with the ngers in thenormal position shown in I-"ig. l, the anti-friction member will be efl'ectively held in position for grinding.

An electric motor 28a is mounted on the upper wall of the casting 28 for driving the chuck or work-holder.h Also supported on the casting at a point to one-side of the motor is an upstanding bracket .2in provided with a bearing sleeve 22a in which a shaft'a is journaled.

Pulleys 84a and 55a are carried by the shaft an'd .are in operative relation to pulleys 85a and 81a attached to the chuck and motor respectively. Power is transmitted from the motor to the shaft 52a by means of a drive belt 55a engaging the pulleys 85a and 81a.

belt 88a is engaged with the andy and extending lat-` 85a to drive the chuck. Cast with the standard 5 ing wheel afterthey have become worn.

'of the casting.

erally therefrom at a point substantially diametrically opposite the bed plate 5 is a horizontally extending arm or shelf 50 and formed integral therewith is a substantially rectangular casting 5I. The-upper face of the casting 5I isformed with a longitudinally extending dovetailed tongue 52. A carriage 53 is mounted for longitudinal adjustment on the casting 5I and is provided with a dove-tailed groove 54 which slidbly embraces the dove-tailed tongue 52.

Extending transversely through the forward end of the casting 5| and journaled therein is a shaft 55 which carries a grinding wheel 55; As shown particularly in Fig. 2 the grinding wheel 55 is formed with right angularly extending grinding surfaces 51 and 58 which coincide with the angular surfaces of the anti-friction member so as to grind the two angular surfaces of the latter simultaneously.

An electric motor 58 is mounted on the carriage 58 and engaged with the driven shaft thereof is an endless belt 55 which engages a pulley 5| on l engages a rack bar 54 fixed to the carriage. The

shaft 52 is equipped with a hand lever 55 for rotating the shaft to adjust the carriage. The carriage is limited in lits forward movement by an adjustable set screw 56 which is mounted in an upstanding ear 51 formed on the' forward end of the casting 5i.

In the operation of the invention the work to be ground being held on the fingers 55 the carriages il and 28 are first adjusted longitudinally and laterally until the surfaces of the work coincide with the grinding surfaces of the grinding wheel 58. The rotating grinding wheel 58 is now brought into Xcontact with the work by movement of the carriage 53 forwardly through the medium of the lever rotated pinion 54. As each piece of work is ground it is only necessary to back up the grinding wheel by movement of the carriage 53 rearwardly. It will be observed that after the carriage has been initially set it will be unnecessary to disturb the adjustment anddue to this adjustment all the pieces of the work will be ground to the'same degree.

'Ihe invention proposes utilizing the chuck to support a suitable resurfacing tooly in position for resurfacing the vgrinding surfaces of the grind- As shown in Figure 6 the resurfacing tool is in position preparatory to bringing the diamond 58 into contact with the innerA face of .the grinding wheel. In Figure 8 the device is in position preparatory to lbringing its diamond 55a into contact with the outer surface oi' the wheel.

For Ycooperation with' the fingers 85 of the 'chuck in holding the resurfacing tool in position. the latter is provided with a rearwardly curvedarm 15 which extends to one side of the casting 28 and lies between a pair of outstanding parallel ears 1| formed on one of A set screw 12 is carried by one of these ears vand is normally .engaged with the arm l5 to hold the same against movement.

What I claim is;

l. In a grinding machine, wherein the grinding tool is adapted to concurrently grind adjacent member faces having the generalv relation of approximate right angles to produce an included angle characteristic therebetweenf and wherethe side walls ljustable carriage, a rotatable grinding element supported thereon, said element being mounted' aomcsar in the faces are each substantially conical with respect to the axis of the member forming the work, and in combination, a longitudinally adfor bodily movement in a fixed path toward and from the work grinding position, and a chuck supported at one side of the grinding wheel and adjustable longitudinally and transversely, said chuck being also mounted for pivotal adjustment on a plurality of independent vertical axes.

2. In a grinding machine, wherein the grinding tool is adapted to concurrently grind adjacent member faces having the general relation of approximate right angles to produce an included angle characteristic therebetween, and wherein the faces are each substantially conical with respect to the axis of the member forming the work, and in combination, a longitudinally adjustable carriage, a rotatable grinding element supported thereon, said-element being mounted for bodily movement in a fixed path toward and from the work grinding position, a chuck supported at one side of the grinding wheel and adjustable longitudinally and transversely, means for adjusting the chuck relative to a plurality of independent parallel vertical axes whereby to dispose the work carried thereby in proper angular relation to the grinding surface of the grinding wheel, and means for removably retaining the work on the chuck in such adjusted position, said latter means being operative to position and release the work while retaining the chuck in its adjusted position. y

3. In a grinding machine, wherein the grinding tool is adapted to concurrently grind adjacent member faces having the general relation of approximate right angles to produce an included angle characteristictherebetween, and wherein the faces are` each substantially conicalwith respect to the axis of the member forming the work, and in combination, a longitudinally shiftable carriage, a rotatable grinding element attached thereto and rotatable about a horizontal axis, said element being mounted for bodily movement in a fixed path toward and from the work grinding position, a support arranged in advance of the grinding wheel, a horizontally @arranged chuck mounted on the support and capable of both transverse land longitudinal adjustment, means for adjusting the chuck relative to a plurality of independent parallel vertical axes so that the surfaces of the Work carried thereby will be in properangular relation to the surfaces of the grinding wheel.

4. In a grinding machine, wherein the grindingtool is adapted to concurrently grind adjacent member faces having'the general relation of approximate right angles to produce an included angle characteristic therebetween, and wherein the faces are each substantially conical with respect to the axis of the member forming the work, and in combination, a longitudinally shiftable carriage, a rotatable grinding element attached thereto and rotatable about a horizontal axis, said element being mounted -for bodily movement in a fixed path toward and from. the Work grinding position, a support arranged in advance of the grinding wheel, a horizontally arranged chuckmounted on the support and capable of both transverse and longitudinal adjustment, means for adjusting the chuck relative to' a plurality of independent parallel vertical axes so that the surfaces of thel work carried thereby will be in proper angular relation to the-sui'- faces of the grinding wheel, and means for adjusting the support whereby the work may be ground to any desired pitch.

5. In a grinding machine, wherein the grinding tool is adapted to concurrently grind adjacent member faces having the general relation of approximate right angles to produce an included angle characteristic therebetween, and wherein the faces are each substantially conical with respect to the axis of the member forming the work, a support, a longitudinally adjustable carriage mounted thereon. a rotatable grinding element supported by the carriage, said element being mounted for bodily movement in a xed path toward and from the work grinding position, a work-holder arrangedv on the support at substantially diametrically opposite the carriage, means for adjusting the work-holder longitudinally towards the grinding element, and means for adjusting the Work-holder transversely to-V wards the grinding element, said chuck being also adjustable relative to a'plurality of independent parallel vertical axes.

6. In a' grinding machine, wherein the grinding tool is adapted to concurrently grind `adjacent member faces having the general relation of approximate right angles to produce an included angle characteristic therebetween, and wherein the faces are each substantially conical with respect to the axis of the member forming the work, a support, a longitudinally adjustable carriage mounted thereon, a rotatable grinding element supported by the carriage, said element being mounted for bodily movement in a fixed path toward and from the work grinding position, a work-holder arranged on the support at substantially diametrically opposite the c-arriage, means for adjusting the work-holder longitudinally towards the grinding element, means for 'adjusting the work-holder transverselyitowards the grinding element, and means for adjusting.I

the work-holder to dispose the'work in proper angular relation to a grinding element, said latter means including independent adjustments relative 'to a plurality 'of independent parallel vertical axes.A A

7. In a grinding machine, whereinthe grinding tool is adapted to concurrently grind adjacent member faces having the general relation of approximate right angles to produce an included angle characteristic therebetween, and wherein the faces are each substantially conical with respect tothe axis of the member 1forming the Work, a base, a longitudinally land'transversely adjustable mounting on the support, and a work supporting chuck supported in the mounting for pivotal adjustment thereon on a vertical axis,

said mounting including a pivotal adjustment on i a vertical axis intermediate the longitudinal and transverse adjustments thereof.

8. a grinding machine, wherein the grinding tool isadapted to concurrently grind adjacent member faces having' the general relation of approximate right angles to produce an included angle characteristic therebetween, and wherein the faces are each substantially conical with respect to the axis of the member forming the work, I

a base, a ,longitudinallyL and transversely adjustable mounting on the support, a work supporting chuck supported inthe mounting for pivotal adjustment thereon on a vertical axis,

' said mounting 'including a pivotal adjustment. on

a vertical axis intermediate the longitudinal and transverse adjustments thereof, a motor suplmember faces having angle characteristic therebetween,

' ,termined straight line path to the path of the other, and means for operported by the mounting, and driving means between the motor and chuck.

Y 9. In a grinding machine, wherein the grinding tool is adapted to concurrently grind adjacent the general relation of approximate right angles to produce an included angle characteristic therebetween, and wherein the faces are each substantially conical with respect tothe axis of the mermber forming the work, a base, a` longitudinally shiftable carriage mounted thereon, a second carriage mounted on the rst mentioned carriage for adjustment transversely thereof, a pivotal connection between said carriages to permit relative adjustments therebetween on a vertical axis, a mount-h ing on the 'last mentioned carriage, a pivotal connection between said mounting and its sup-` porting carriage to permit relative adjustment therebetween on a vertical axis, and a work supporting chuck `journa1ed in the mounting.

1'0. In a grinding machine, wherein the grinding tool is adapted to concurrently grind adjacent member faces having the general relation of approximate right angles to produce an included angle characteristic therebetween, and

wherein the faces are each substantially conical with respect to the axis of the member forming the work, a base, a longitudinally shiftable carriage mounted thereon, a second carriage mounted on the iirst mentioned carriage for adjustment transversely thereof, a pivotal connection between said carriages to permit relative adjustments therebetween on a vertical axis, a

mounting on the last mentioned carriage, a pivotal connection between said mounting and its supporting carriage to permit relative adjustment therebetween on a vertical axis, a work supporting chuck journaled in the mounting, a motor supported from the mounting and a driving meansbetween the motor and chuck.

11. In a grinding machine, wherein the grinding tool is adapted to concurrently grind adjacent member faces having the general rela-tion of approximate right angles to produce an included and wherein the faces are substantially conical with respect to the axis of the member forming the work or a plane normal to such axis, said machine including a base, a work-holding chuck, and means for adjusting said chuck rectilinearly and pivotally on said base to dispose work carried by the chuck in proper angular relation to the grinding tool of a grindinginstrumentality, said means including independent carriages each atively connecting said carriages pivotally to permit variations in the relative angular-ity of the paths, one of said carriages supporting the chuck.

12. A machine as in claim l1 characterized in that means are provided'for pivotally adjusting the position of the chuck on its supporting carriage with the pivot axis non-alined with the axis of pivotal connection between the carriages.

13. A machine asin claim 11 characterized in that the chuck includes work-supporting elements shiftable between work-supporting and work positioning and releasing positions while retaining the adjustments of the chuck relative to the base.

14. A machine as in claim 11 characterized in that the chuck includes work-supporting elements shiftable between work-supporting and I that the' connecting means movablel in a predeangular with respectwork positioning and releasing positions while retaining the adjustments of the chuck-relative ,to the base, the movement of the elementsy be-l tween such positions being in directions angular to the axis of the wor n 15. A machine as in claim 11 characterized in for the carriages in'- cludes a mounting element carried by one of the carriages and pivotally connected adjustably therewith on a vertical carried by the second carriage straight line path of the latter.

16. A machine as' in claim 1l characterized in that the connecting means for the carriages includes a mounting element carriages and` pivotally connected adjustably therewith on a vertical axis, said mounting element and the'second carriage carrying complemental means operative to denne the straight line path of the second carriage, said chuck having an adjustable pivotal connection with the second carriage on a vertical axis non-alined with the pivot axis of the mounting element.

17. In a grindingvmachine for the production of race or cone members of taper vroller bea-rings, wherein the race or cone member presents a pair of adjacent roller-engaging faces angularly related at approximate right angles with said faces having conical characteristics rela-tive *to the axis of the memberor a plane normal to such axis, a grinding instrumentality including a rotatable grinding tool having its active grinding zone shaped to concurrently grind both faces of the' member when member and tool are brought into co-operative relation, and a work-supporting instrumentality adapted'toposition the bearing member with the member axis angular to the path of rotation of the tool, said work-supporting instrumentality` including a work-supporting chuck, a base, and elements therebetween 'co-operative to support the chuck o n the base and permit pivotal and rectilinear adjustmentsA of the chuck relative to the base with said adjustments including rectilinear adjustments longitudinally and transversely and pivotal ad-` justments on two independent vertical axes, whereby the angularity of member axis and tool path of rotation and the distance characteristic of axis and path is variable vat will to permit pro- I differing in dimensional its grinding faces as angular to a plane normal to the axis of tool rotationwith the faces difiering in radial length and angularly related to each other in correspondence with the angularity of the included angle ofI the pair of member faces, the relation of member and tool during grinding vpresenting vthe tool faces as .inclined and non-parallel with the member vaxis or a plane normal to the member axis. l

19. A machine 'as in claim 17 'characterized in that the grinding tool is movable in a rectilinear path between active and inactive positions with the adjusted chuck maintained in position to locate the member in the activeposition of the tool, whereby the angularity and distance characteristics of work axis and tool path remain constant in the grinding of successive members.

smas A. STRICKLAND.

axis, said element carrying a way co-operative with a complemental way to define thel carried by one of the 

